Alex,
First of all, the version of Ghost you have is not the latest. Run LiveUpdate and get your copy up to the current build, which is 11.5.1.2266.
Secondly, did you at any point add the SATA and RAID drivers for your IBM system to WinPE? You originally mentioned a single 150Gb hard disk but now you mention two such disks in RAID1 configuration.
The issue here is that unless you have the correct SATA and RAID support present in WinPE, it is likely that WinPE is not able to mount the disk array correctly and so may only be able to view a recovery partition.
If you boot to WinPE, and exit Ghost to the command prompt, you can make some checks of the hard disks using DISKPART.
So type DISKPART at the command prompt. After a few seconds, it will give you a new prompt.
Then type: lis dis (short for list disks) - this will list the disks that WinPE can see.
You can then select a disk for further investigation using the command SEL DIS 1 (or whatever number you wish to view)
Then type LIS PAR (list partitions) - this will display the partitions that WinPE can see on the selected hard disk.
Type EXIT to return to the WinPE prompt. Unless you can see the disk layout you expect, it is likely that the drivers are not present or not loading.
If you have drivers available in the form of an INF, SYS, CAT file, WinPE can dynamically load them from the command line - eg from a USB stick. The command is: DRVLOAD (path/filename of INF file). However, I cannot be sure if this will guarantee access to the RAID array, as I've only used the dynamic loading technique to get a USB3 external drive mounted, and that is a plug and play device, whereas internal hard disks are not usually mounted this way.