12.10 - 3 OS's on same HDD

I've been all day around my laptop and just can't make it work,

I have one HDD 750 GB in size, and I would like to have the following partition table:

60 GB - Windows 7
150 GB - Windows 8
150 GB - Ubuntu 12.10
390 GB (Rest) - Logical drive for files

However for some reason (and I start by installing windows because I want grub for boot menu) it is not possible to begin the installation with this table and the problem is I cannot have more than four partitions on same disk, since windows automatically creates that annoying 100 MB extra partition.

So after many many trial - error installations and partitioning I got this:

part1: 100 MB - Windows (auto created)
part2: 60 GB - Windows 7 installed
part3: Extended partition with
    3.1: part5 150 GB -> Windows 8 installed
    3.2: part6 360 GB -> logical for files
    3.3: part7 8 GB   -> Swap
    3.4: part8 160 GB -> Ubuntu 12.10

All OS's were successfully installed I can see every partition's content on Ubuntu.

Since Ubuntu was installed last I managed to have grub, which shows windows 8 (fails to boot when selected: 'Error reading disk'), windows 7 doesn't show at all, and Ubuntu seems pretty fine to me.

Is there any way to make this work? I searched everywhere can only find dual boot solutions... I don't mind having to reinstall everything again.

Output of

sudo fdisk -l

Disk /dev/sda: 750.2 GB, 750156374016 bytes
255 heads, 63 sectors/track, 91201 cylinders, total 1465149168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0x44ae409c
   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *        2048      206847      102400    7  HPFS/NTFS/exFAT
/dev/sda2          206848   127066111    63429632    7  HPFS/NTFS/exFAT
/dev/sda3       127068158  1465142699   669037271    f  W95 Ext'd (LBA)
Partition 3 does not start on physical sector boundary.
/dev/sda5   *   127068160   423938047   148434944    7  HPFS/NTFS/exFAT
/dev/sda6       423940096  1132926975   354493440    7  HPFS/NTFS/exFAT
/dev/sda7      1132929024  1149175807     8123392    7  HPFS/NTFS/exFAT
/dev/sda8      1149177856  1465142699   157982422    7  HPFS/NTFS/exFAT
Disk /dev/sdb: 7948 MB, 7948206080 bytes
245 heads, 62 sectors/track, 1021 cylinders, total 15523840 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0006d557
   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1   *          62    15508989     7754464    b  W95 FAT32

Thanks