ok, im trying it too..
things ive did..
a small work-around;

1.
Install SSH server

2.
copy rcS file by typing in terminal; cp /etc/init.d/rcS /home/user/MyDocs/

3.
open the file using SSH with 4 example notepad++ (or whatever you want , dont use notepad)

4.
search by using ctrl+F the keyword; swappiness and change value 100 in 30.. and same thing for 'page-cluster' and change the value from 4 to 1

5.
save the rcS file and copy it back to MyDocs using SSH

6.
copy the rcS file back by typing "cp /home/user/MyDocs/rcS /etc/init.d/rcS" in terminal

7.
Check if the file have the exec permissions by typing;
ls -al /etc/init.d/rcS
will show rwxr-xr-x
(look at the 3 x)

8.
If so, ur done reboot ur phone..

p.s. allways be root at terminal..and do it at own risk

You can check the values by typing;
cat /proc/sys/vm/swappiness
or
cat /proc/sys/vm/page-cluster


greets