Cause: Multiple NITdroid installations, partitions which I can't see anymore on Emmc, reflashing of the phone multiple times, noobish experience.

I have read and read numerous pages and tried reflashing multiple times using 3.5 flasher on a WinXp machine to the point where the last time I flashed it resulted in the phone having no more memory to install applications on the internal memory. I have an external SD card but I can't find a thread that will help me extend/replace/fool the OS into letting me install applications there so that I can install rootsh, and fdisk and redo my partitions. I need serious help. Frankly I'm tired of reading, trying, and failing. No one else to blame but myself so help to at least get me back to a point where I can erase all partitions and reformat eMMC to stock specs and then I can reflash the phone to get all my memory back. Please help.