Does anyone have working modelines for the other (lower) display resolutions of the Apple 30" LCD monitor?

Specifically,
2048x1280 (I really want this one)
1920x1200
1280x800
1024x640

I'm using a NVidia Quadro 4 with the nVidia drivers.

These seem to be working modelines for the 2560x1600 max resolution:
(I can verify that the top one works at 60Hz.)

+# 2560x1600 @ 60.00 Hz (GTF) hsync: 99.36 kHz; pclk: 348.16 MHz +Modeline "2560x1600_60.00" 348.16 2560 2752 3032 3504 1600 1601 1604 1656 -HSync +Vsync
+
+# 2560x1600 @ 70.00 Hz (GTF) hsync: 116.55 kHz; pclk: 410.26 MHz +Modeline "2560x1600_70.00" 410.26 2560 2760 3040 3520 1600 1601 1604 1665 -HSync +Vsync
+
+# 2560x1600 @ 75.00 Hz (GTF) hsync: 125.25 kHz; pclk: 442.88 MHz +Modeline "2560x1600_75.00" 442.88 2560 2768 3048 3536 1600 1601 1604 1670 -HSync +Vsync
+
+# 2560x1600 @ 85.00 Hz (GTF) hsync: 142.80 kHz; pclk: 507.23 MHz +Modeline "2560x1600_85.00" 507.23 2560 2768 3056 3552 1600 1601 1604 1680 -HSync +Vsync

Thanks!

John

[mimithebrain@localhost Desktop]$ ./gtf 2048 1280 60

# 2048x1280 @ 60.00 Hz (GTF) hsync: 79.50 kHz; pclk: 221.33 MHz
Modeline "2048x1280_60.00" 221.33 2048 2192 2416 2784 1280 1281 1284 1325 -HSync +Vsync