You have:
A4000D 18mb,WarpEngine040w/128mb,Picasso IV,X-Surf,18GB SCSI,8GB CF,IDE CDRW->SCSI 8-)
A4000D-30,18mb,CDRW
A3000, A1200(x2), DKB 1202 w/8mb
A2500 GVP 030,GVP 2000HC+8,Bridgeboard,ROM Switcher,CDRW,DCTV,Toaster,TBC II,etc.
A2000(x3),8-UP,Spitfire,...
...and you say:
Forgive me for sounding noobish......
...because you don't know what to do with a Retina-card in an A3000, while you also mention:
sysinfo shows 18mb total memory so I don't if the Retinas mem would show up here or not...
Right?
I am slightly puzzled, to say the least.

Amused, but puzzled.