Well, I did it!

1. I flashed SU-18_2007HACKER_4.2007.46-3_PR_F5_MR0_ARM image
2. I installed becomeroot_0.1-2_armel.deb
3. I installed libncurses5_5.4-4_armel.deb
4. I installed osso-xterm_0.13_armel.deb

5. I installed SkypeUI directly from AppManager's recent repos.
- Accept the EULA and place the icon to "extras" eg.

6. I downloaded skype_1.7.62.51.1_armel.deb and unPacked it in PC. out came data.tar.gz. Extracting that came out usr/bin/skyhost (1.6MB)

7. I copied this file (skyhost) via USB cable to MMC's root. then unplug.
8. I started X-Term
9. "sudo gainroot"
10. "cp /media/mmc1/skyhost /usr/bin"
11. "chown user:users /usr/bin/skyhost"

* start the Skype.

Works! tested with SkypePC 3.5 to N770 version. ok.