LVM Setup on an already installed Ubuntu gnome server topic

Hello everyone, I'm trying to set up an LVM on my File sharing server. The server has ubuntu 14.04 lts 64 bit running on a pentium dual core E2140 @ 1.60Z GHz with 1gb of memory (will be getting upgraded to 2 gb). The server is also running the latest version of Gnome. For drives right now I have 7 drives in the server:

Model: ATA IC35L04AVVA07-0
Size: 31.50 GB
Path: /dev/sda
File System: NTFS

Model: ATA IC35L04AVVA07-0
Size: 31.50 GB
Path: /dev/sdb
File System: NTFS

Model: ATA WDC WD400BB-60DG
Size: 37.27 GB
Path: /dev/sdc (this is the OS hard drive)
File Systems: sdc1 - ext4 sdc2 - extended sdc5 - linux-swap

Model: ATA Quantum Fireball
Size: 19.01 GB
Path: /dev/sdd
File Systems: sdd1 - extended (unallocated)

Model: ATA ST3250310AS
Size: 232.83 GB
Path: /dev/sde
File System: NTFS

Model: ATA WDC WD3200AAJS-6
Size: 298.09 GB
Path: /dev/sdf
File System: NTFS

Model: WD I HDS72 External
Size: 465.76 GB
Path: /dev/sdg
File Systems: sdg1 - extended New Partition #1 - lvm2 pv

I have no cd roms in the tower and no usb flash drives to do a live cd boot. what I want to do is first setup the group with sdd and sdg and move the files from the other drives to it (except the os drive) then I want to add the other drives to the group making it act as a drive with a little over a TB is there any way to do this without having to do a clean install or boot from a live cd? (I really don't want to do a clean install it takes a long time to get everything running correctly) if any other info is needed please let me know and I will get it for you. Thank you for your time and help :-) Christopher J. Crandall