I saw your post last time, no need to spam the forum
1. Yes, I'll try to incorporate it when I get my harddisc back online.
2. You create a new .inc-file for it (and fill it with the nescessary data, see HoI2 wiki or get inspiration from the original ones), then add an "include" line to the new file in the Scenario .eug-file. The country will now be in-game, but without flags, ministers etc. To play it, you need to add its tag to the "selectable" group at the top of the .eug file.
3. No
4. Since I don't have my computer up, I don't remember what the tag for Bangladesh is. Anyone?