the installer should have some hardware auto-detect (detecting ssd and uefi) and show suggestions (your computer could behave like this... do you want to change this options ?) or show multiple options: install this / that; disable uefi / ssd; create more parttions and so on....
this should work on some lenovo models:
1. Disabe RAID (select ACHI in BIOS)
2. Install windows to SSD.
3. Move user data and pagefile to HDD. Disable file indexing on SSD. Install most not system programs to HDD to economy free space. It will be even faster than cache, but you need to install big programs and games on D:\. Not every man can do it. Thats why they use cache as default.
4. Boot Ubuntu from CD, type in terminal "sudo apt-get remove dmraid"
5. Install Ubuntu as usual
6. If GRUB doesnt appear (it is because of UEFI) use Boot-Repair utility as described here https://help.ubuntu.com/community/Boot-Repair