Description of problem:
anaconda fetches the minstg2.img while there is a rescue cd in the cdrom drive,
then fails mounting minstg2, as stage2 is already mounted from the cdrom, when
you select text install or have < 128 meg ram. 

Version-Release number of selected component (if applicable):
11.3.0.50 and 11.4.0.1

How reproducible:
always

Steps to Reproduce:
1.select text install on rescue cdrom
2.or have < 128 meg ram and select graphical install
3.
  
Actual results:
retrieves minstg2.img

Expected results:
uses stages2.img on rescue cdrom for text install
(saves the memory/bandwidth of minstg2)

Additional info:

in urlinstall.c
  /* require 128MB for use of graphical stage 2 due to size of image */
    if (FL_TEXT(flags) || totalMemory() < GUI_STAGE2_RAM) {
        stage2img = "minstg2.img";
        if (totalMemory() < GUI_STAGE2_RAM)
            logMessage(WARNING, "URLINSTALL falling back to non-GUI stage2 "
                       "due to insufficient RAM");
    } else {
        stage2img = "stage2.img";
    }

is run after:

            /* ok messy - see if we have a stage2 on local CD */
            /* before trying to pull one over network         */
            cdurl = findAnacondaCD(location, modInfo, modLoaded,
                                 *modDeps, 0);
            if (cdurl) {
                /* verify that our URL is specifying the correct tree */
                /* we do this by attempting to pull a .discinfo file */