How do you tune cars in gta Liberty City stories for psp?

In GTA: Liberty City Stories for PSP, you can tune cars by visiting a garage or using a specific vehicle tuning shop. Once inside, you can access options to modify your car's performance, such as improving speed, handling, and acceleration. The game allows you to customize certain aspects, like paint jobs and decals, but detailed tuning is limited compared to other titles in the series. Always remember to save your modifications once you're satisfied with the changes.