DONT PANIC! You dont need a ad hoc party ( even tho i have it) u can use something called wifi max ( u have to buy it) and xlink kai, i dont much about these but i know it works just like ad hoc party ( search on youtube or google)
Or just CFW your PSP and get the plugin. The problem is that BBS might require a system update to 6.20 or above and that is bad