...if you want IVAN on PSP, make it yourself. Or, you know, find a bunch of coders and pay them to make a port. Whinging about it not existing will not make it happen.
Edit: I feel like being helpful so
here is a link to the PSP-compatible
DOSBox and
also one to a place where the DOS port of IVAN can be found just under the Windows port binary. JimmyJ mentioned this in your poll but maybe you forgot or missed it so here is a workaround just for you.