HaloMods "Classic" Read-only Archive

Alright I just started to mod and I need a lot of help. I cant figure out how to skin vehicles and weapons. I go into Dothalo and go to the bitmap, extract the DDS texture go to Paint pull out the texture and edit it. I put it back into the map and put it on my xbox but nothing happens. Another thing I cant do is transfer my old maps onto the Disk with FlashFxp. Can you please help me.

you have to copy your disc to the xbox hard drive, and you need to internalise the bitmap