Hello, yes this is possibel. ndcucfg provides the commands: boot write <filename> (eboot) psd write <filename> boot bmp write <filename> (soon with kernel V2.10).
You may call ndcucfg with corresponding command line direct vai X-command in the update script. Or wrap the functionallty into an own program using ndcucfg library (refer myf&s->tools->ndcucfg->NDCUCFG_Library_eng.pdf).
