EXS 24 Logic Sampler Users Group

I'm in the middle of putting up a humble Spectrasonics 
sample library containing 5 of them sample cd's.
Putting the first 3 cd rom titles into EXS24 was done without
any problems. They are present in the Sampler Instru-
ments flip menu and they play back as they should.
Putting the third CD from their Metamorphosis (which
features groove control) is another story:
First of all, the akai conversion took nearly 2 (two!)
hours, compared to the 3 Distorted Reality and the 2 Supreme 
beats CD's which were done in 1 hour tops.
I checked out the Meta 3 cd it's content and compared to the other 
copied CD roms it's huge: 934 mb! with 934 files and 13805 maps.
That's funny cos the actual third Meta cd (it's a 3 cd box +
an additional GC CD) i took it from is only 650 MB.
Although i placed the Meta 3 file brotherly next to other
files in the Sampler Instruments folder it doesn't show up
in the SI flip menu. I've put Meta 3 in Meta 2, still no show
in the Meta 2 flip menu.
BTW, the first 2 Meta cd's are set up without any problems,
and they sound f*cking great. 
Anothet thing that strikes me: How come the content of a sample cd 
expressed in mb is next to nothing compared to the actual size of
the cd rom. An example: I've put Emagic's Xtreme Analog sample
library into EXS24. The actual content of XA is 100 mb spread over
261 files and 8 maps. Well, rightclicking the XA file in the 
SI folder gives the following: 2,13 mb!, while the 261 files
and the 8 maps stay in places. And yet it all works ok, the XA
is a huge sounding CD Rom.
PS i still got over 6 GB left on my HD, and work with 866mhz and
512 ram and after every SI folder change i relaunch Logic Audio.
What did i miss?