theres a program that extracts vcm, here. then its extracted to dff and txd files, so you can use imgtool to add them in. dont forget to BACKUP
i think you need to make your files not read only. go to your vice city folder and right click, click properties, and click read only until it is blank, then when it asks, say "apply to folder and files"
thanks ill give it a try i thought i did make em not read only but who knows lol