None that I know of. However, I'd gladly help you out with any questions you might have, and I'm certain there are other players here that would do so as well.
I'll try to write a short introduction to the game.
First, if you'd like to get to know everything, start a simple endless game without an AI opponent. This won't be much of a challenge once you've understood the game mechanics, but with an AI enemy, the game will be to hectic to actually have fun (if it's the first time you're playing).
What it's about
Constructor is about building stuff, gathering wealth, satisfying the needs of your tenants and dealing with your opponents. All at the same time.
Building:
You build houses by selecting them in the appropriate menu, then you select a plot of land and the size of the property. This of course requires lad to begin with, but if you're just starting the game you should have one mostly empty piece of land with only your HQ.
To actually be able to build stuff, you need to things: resources and workers. Ressources are produced in factories, which have to be built via the buildings menu. Once you've got a construction site ready, you have to send a foreman with his worker to the site. Select the foreman and move him to the site, the workers will follow. There's a menu where you can adjust the number of workers attached to each foreman.
After a factory has been built, you have to use a working party to produce the ressource (you'l be starting with wood). Move them inside the factory to let them work there.
After your factory has been set up, try building some houses. Same procedure, select from menu, select property size, and send a working party over. They'll start building a house (and using up ressources in the proccess).
This basically repeats for all kinds of buildings.
Tenants:
There are multiple levels of tenants for multiple levels of buildings. You'll be starting out with the lowest level, who may either pay rent or produce more lvl 1 tenants or workers. Rent is you major source of income, but workers and more tenants shouldn't be neglected, as your old tenants will some day either move out or die and have to be replaced, and you'll need many workers later on to maintain multiple factories and constructions.
Tenants are quite an unhappy lot, as they'll complain a lot about the factory next to their house being too loud, their neighbors receiving more stuff etc. Most of the complaints are self-explanatory, but some will leave you puzzled at what exactly they want.
Houses can be upgraded, either by refurnishing certain rooms (increasing rent, life expectancy, "child production speed" etc), and you can produce certain upgrades at the Upgrade Factory for a certain price, which then may be installed in the houses. For example, a computer installed in a lvl 1 home allows the tenants to produce lvl 2 tenants, which are obviously needed for level 2 homes.
Several special buildings may also be built which allow for similar upgrades (e.g. building a school will stop you having to install computers in every home)
Maintenance:
There's another type of worker, the repairman. As the name suggests, he repairs stuff. He can auto-patrol lots and will repair all the buildings there. You should strongly consider having a repairman for every lot you own, manually repairing buildings costs a lot of money and will soon become a tedious task with 20+ buildings.
Missions:
From time to time, you'll have to complete certain missions. These can quickly become game-breaking as in the game is over if you don't manage them. They can range from "upgrade your property" (meaning you have to build more stuff on empty land you own) to "construct a certain amount of houses in a certain amount of time". The first few missions will feel VERY hectic and you'll probably lose the game quickly the first time, but you'll get used to it and quickly will find that a nice little challenge.
You'll have to pay taxes from time to time, and buildings and upgrades will cost you a lot as well. Try to maintain a healthy balance between tenants who pay rent and tenants who produce offspring and workers / police / etc.
Special Stuff:
There's a number of special buildings, most of them only useful for harassing enemy players / AI or defending yourself against them. They range from annoying a tenant to blowing up a whole block or killing enemy units/workers/tenants. Since you should start out in a strict single player game, you shouldn't worry about there to early.
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Yeah ... that's all I could think of right now. Some facts may not be up to date, it's been a while since I played Constructor and right now I'm waiting for my PayPal Account to update in order to buy the game. If you have any further questions, just ask, I'll try to check back here again every now and then.

Wow, very thorough! When I start, this guide will be invaluable, thanks.

This walkthrough helped me:
[url=]http://www.gamefaqs.com/computer/doswin/file/377328/32552[/url]