Hope you guys can help installing Tex Murphy to my tablet.

If I enter general rules: 

Mount c /xxxx/xxxx/games 
C: 
Cd pandora 
Tex 4 

It boots ok but I get an error stating 'no cdrom drive available, aborting the game' I may now be doing this wrong but I then enter: 

Mount c /xxxx/xxxx/games 
Mount d /xxxx/xxxx/games/ -t cdrom 
D: Cd pandora 
Tex4 

Thats when I get the error message DOS/16M error (40) not enough abailable extended memory (XMIN)

I am really at a loss. My friend has managed to get Phantasmagoria to run which is a similar FMV game. I have amended the memory settings, all to avail.

Please help.

You are using the GOG version of The Pandora Directive, aren't you?

EDIT: You can ignore the question, I thought maybe the naming of the CD images was the problem.

Did you set

xms=true
ems=true
umb=true

And I think the line "set dos4gvm=" in the autoexec part of the GOG DOSBox config for Pandora is important, but I can't remember at the moment what that did.

Oh and GOG has "memsize=16" but that is the DOSBox standard setting if I remember correctly.

You should ask for help to the DOSBox Turbo "developer": this "app" is a non-free rip-off of the original DOSBox, its "seller" asks for money for something that's absolutely free on a personal computer and doesn't deserve even a bit of help and attention from PC gamers. IMHO.

Oh right, I totally forgot that Dosbox Turbo was from that idiot as I my smart phone does not use Android or IOS. And has a real Dosbox port which I never use.

What?

I only have a passing knowledge of the Android and IOS market because I have at the moment a Nokia N900 which runs pretty much vanilla Linux. And as such there is a normal port of Dosbox by the dev team. But I think i never used that because I am normally at home when I would have time to play a DOS game, so I do that on my PC. And the CPU of the N900 is not the best, so I think everything after 1992 or so will probably run too slow.
Sorry for being a bit off topic.

It's optimized, but it's still a rip-off.

The dosbox turbo was free, however I paid for the manager which stores settings of games, sort of like a d-fend utility. Yes I am using the GOG version

Regarding xms, ems and umb, the manager just gives you the option to tick or untick these. Tried variations and it does bypass the memory error message but then just hangs on a black screen.

If you mean with gog files, files that have the .gog extention try changing it to .iso and mount that.