I have the same issue with the Texturepacks. So I made one by myself. Here is a quick guide on how I did this for Soartex Pack, maybe I can help anyone with this.
1. Download the estimated modpack on Soartex download page (
http://soartex.net/downloads/) in my case it was for the unleashed package
2. Download the vanilla pack from Soartex for the right vanilla version, for unleashed it is the 1.5
3. Download the Texture-Patcher from Soartex
4. Start the Texture-Patcher and select in first windows the right Mod-Branch, for unleashed it is the 1.5.x
5. Click on 'Browse' and select the 'Soartex_ftb.zip' file you downloaded
6. Click on 'File' and 'Select all' then on 'Patch' and let it go, this will take a while
7. Now the 'Soartex_ftb.zip' file has the right format to put it directly in the texturepack folder from unleashed
I have not checked all of the textures, I just tabbed through the NEI and all seems to be ok. Additionally I don't know if this is the correct or easiest or shortest way, it's just a way which is working for me. I'm realy new to minecraft and all the mods and texture packs and so on, just made a server for my cousins between christmas and newyear and learning a lot in the last 4 weeks. Hope I helped anyone with this little text. It also should work on other ftb versions, as long as you get the right Soartex pack.