GTP is already a poor man's raze kar... And like noted, if you want to play, you have to pay!
Rules for modding, no exceptions!
There are three things you can do/experience, and it is represented in a simple formula...
Fast/Reliable/Cheap
Place your finger over which one you want and you'll see what you're left with.
Want fast? It won't be cheap/reliable...
Want reliable? It won't be fast/cheap...
Want cheap? It won't be fast/reliable...
Or just know you can only have 2 of the three at any one time, use the examples in reverse... If you want fast/reliable, it isn't cheap!
Those are the universal laws, many have tried to escape them unsuccessfully.
Add to this your are looking at an old platform where everything that has been thought of has been done already. Take heed the suggestions. You don't have $ but want to throw it away on garbage. Good idea! Save your money, save some more and get what works, you'll be much more satisfied. Those chips basically tell the engine it's 10* outside so they dump fuel. Light as we just unplug your IAT sensor and allow the ECM to default temps. Again, more placebo than anything.
In any event, good luck