update old release 3.0 to 7.0

[lebardix]

Hi,
I want update applis on release tinycore 3.0.21 and add new perl app -home automation- http://fhem.de

but

• existing tcz in 3.0 disappear in 7.0 - rrdtools and owfs - howto update/rebuild theseexisting tcz in 3.0 disappear in 7.0 - rrdtools and owfs - howto update/rebuild theses packets ? (some docs or explainations )s packets ? (some docs or explainations )
• for fhem (perl http server) need libgd, with some extension - libgd-gd2-perl and libgd-text-perl - and libgd.tcz not includes theses, howto add ?
  

can-you help me for this 2 subjects ? (sorry for my poor english language....)
thank's