Hi there,
If you need to tweak the BSP image you'll need to fisrt get that BSP, install it on a host machine (Lunix box), our BSPs are mainly based on LTIB now, (some are still on PCS). Once installed you'll be able to tweak configuration and rebuild it and deplyed it. That what LTIB (or PCS) are made for.
Now becasue you need a Linux box to deal with BSPs, I would recommand to use CW Linux hosted version.
In order to reflash you board with bootloader/kernel... you'll need CW (Windows or Linux hosted it does not matter) flash programmer tool.
the CW Professional Edition (Windows hosted) does not feature the Linux awareness, CW Platform Edition (Linux hosted is). That is essential to debug Linux kernel and kernel modules.
Hope this helps...
Best Regards