Need some plant help

what up my blender friends? alright, down to the point. i need some help with my game engine plants. but unfortunatly the plants are not glsl, so they go gray when i go into glsl mode. so is it possible to mod the plants without having to completly change them out?

Sure. If you are switching from texture face materials, then all you need to do is to add an image texture to the material of the plant, and set its “Map Input” to UV.
To change from blender multitexture material you do almost the same thing.
Let me know if you need instructions on how to do this.