Spring RTS Engine

I know^^ But I want to play the TA maps in spring

Didn't know, where to post this...sorry if it's wrong here.

I'm looking for some maps of the original TA.

Troutfarm
Steeljungle
Assault on Suburbia

Cannot find them in the downloader or somewhere else...are there no urban maps for spring? Didn't find a single one yet.

It's not the fps. settings are the lowest...
I mean, can I make spring use the second core for example?

so can I do anything to make spring run better?

I think, I got the problem. But I don't know how to solve it...
Spring only uses 1 core witch runs on 100% usage then...
How can I change the settings to use both cores?

Springs doesn't work well. It lags like hell...
Doesn't matter how I change the settings. Don't think that my computer is the reason (dualcore, 4gb ram, geforce 9600 512mb).
Tried original game, Balanced Annihilation mod and Complete Annihilation mod.
Any ideas?