Swap /data partition with sdcard HTC Legend topic

Hi, I am trying to swap mount points to increase internal memory on my device - HTC Legend.
I know that there is script for this purpose.
http://forum.xda-developers.com/showthread.php?t=902395 .
As I can guess here we just use /sd-ext partition to swap it with /data. But in my case I have no /sd-ext partition at all, only /sdcard.
Of course I have no device /dev/block/mmcblk0p2.
About installed firmware - Android 2.3.7 ExtremeLegendFuse_2 based on CM7.
Output of mount command.

Code:

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rootfs on / type rootfs (ro,relatime)
tmpfs on /dev type tmpfs (rw,relatime,mode=755)
devpts on /dev/pts type devpts (rw,relatime,mode=600)
proc on /proc type proc (rw,relatime)
sysfs on /sys type sysfs (rw,relatime)
none on /acct type cgroup (rw,relatime,cpuacct)
tmpfs on /mnt/asec type tmpfs (rw,relatime,mode=755,gid=1000)
tmpfs on /mnt/obb type tmpfs (rw,relatime,mode=755,gid=1000)
none on /dev/cpuctl type cgroup (rw,relatime,cpu)
/dev/block/mtdblock3 on /system type yaffs2 (ro,relatime)
/dev/block/mtdblock5 on /data type yaffs2 (rw,nosuid,nodev,relatime)
/dev/block/mtdblock4 on /cache type yaffs2 (rw,nosuid,nodev,relatime)
/dev/block/vold/179:1 on /mnt/sdcard type vfat (rw,dirsync,nosuid,nodev,noexec,relatime,uid=1000,gid=1015,fmask=0602,dmask=0602,allow_utime=0020,codepage=cp437,iocharset=iso8859-1,shortname=mixed,utf8,errors=remount-ro)
/dev/block/vold/179:1 on /mnt/secure/asec type vfat (rw,dirsync,nosuid,nodev,noexec,relatime,uid=1000,gid=1015,fmask=0602,dmask=0602,allow_utime=0020,codepage=cp437,iocharset=iso8859-1,shortname=mixed,utf8,errors=remount-ro)
tmpfs on /mnt/sdcard/.android_secure type tmpfs (ro,relatime,size=0k,mode=000)
#

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And df -h

Code:

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# df -h
Filesystem                Size      Used Available Use% Mounted on
tmpfs                  145.7M    32.0K    145.7M  0% /dev
tmpfs                  145.7M        0    145.7M  0% /mnt/asec
tmpfs                  145.7M        0    145.7M  0% /mnt/obb
/dev/block/mtdblock3    240.0M    160.7M    79.3M  67% /system
/dev/block/mtdblock5    185.1M    18.9M    166.3M  10% /data
/dev/block/mtdblock4    40.0M      6.6M    33.4M  16% /cache
/dev/block/vold/179:1
                        967.6M    194.8M    772.8M  20% /mnt/sdcard
/dev/block/vold/179:1
                        967.6M    194.8M    772.8M  20% /mnt/secure/asec
#

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Content of /system/etc/vold.fstab

Code:

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dev_mount sdcard /mnt/sdcard auto /devices/platform/usb_mass_storage/lun0 /devices/platform/msm_sdcc.2/mmc_host/mmc0

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I have some basic knowledge, but I need help in this case.
Please help to swap storage to increase internal storage.
Thanks everyone in advance.