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It's not going to be easy to get these to work, if they will work at all.
Firstly, ADSL and Cable broadband operate in different ways. Cable broadband can only be obtained using a cable modem, ADSL using an ADSL modem. ADSL specific routers usually include the ADSL modem, whereas routers used for cable, will not include a modem, but have a WAN (internet side) port which you use to connect to the separate modem. Thus you can in fact use a router designed for cable on ADSL if your ADSL modem has an ethernet rather than USB port. ADSL specific routers tend not to have the ethernet WAN port, any ports on ADSL routers are for the LAN (network) side only.
Without a means of connecting the WAN side of a router to the cable modem, you cannot use a router in the normal configuration : broadband connection <> router <> computers.
However, some routers have the ability to operate in a bridging mode. This might enable one of them to act as some sort of wireless access point. Whether the Wanadoo ones will or not I dunno. Youll have to read the manual
. If that is the case, your will need two network connections in your PC, and your PC will need to be on to get the network to operate, with it's internet connection sharing options enabled. Your connections would then be something like modem <> PC card #1, PC card #2 <> router #1, router <> consoles.
TBH it's all going to be a lot off faffing about. SInce you are trying to connect up a PC, and Xbox and now another console, I'd make your life easier and just get your self a proper cable orientated router. I've seen the Linksys WRT54GL on sale for as little as £30 recently at places like Overcklockers.