Add driverspack's to good but little old vistape ? How ?

Hello, i have existing vista pe, its good for me, i builded it some time ago with winbuilder....

And i have it on usb, bootable, grub4dos, file structure on usb root is:
2010-12-10 07:57 <DIR> boot
2010-12-10 07:57 <DIR> Programs
2010-12-08 11:48 2˙048 boot.catalog
2008-01-19 21:00 333˙203 BOOTMGR
2009-12-20 03:11 2˙048 default
2012-03-21 11:38 285˙507 grldr
2009-07-29 15:55 111˙864 memtest.bin
2010-12-31 06:44 3˙388 menu.lst
2012-03-21 11:38 0 penv
2009-12-12 19:54 0 usbdrive.tag
2010-12-08 11:44 8˙440 vistape.cfg
2010-12-08 11:48 160˙845˙124 vistape.wim






Now i would like to add more drivers to it, to be able to use some new hw's like wireless lan orsimilar..

Could you advise me how to do it ?

Best option is for me, because often work with small ram computers, to have some standalone program, after vistape boots i would like to run this program which ask me where i have drivers and automatically detect and install every hardware i choose....

I am thinking about drivers from driverspack...

How can i do it without building new vpe with winbuilder ?
thanks.