Basic interpreter extensions C++

I need someone to extend a basic interpreter with some additional commands and functions.... -Add an "on error goto" handler -Add variable scope (currently only allows globals.. but needs locals for functions/procedures. -Add function/procedure support with parameter passing (sub/function) ... -Add special variable jumping... so that goto,gosub and call (for subs and functions) can handle variables like "goto somehwer$" -changes in graphics handling... currently supports basic graphics commands, but I need more to allow more font handling options, rotations, resize functions etc... (uses libGD.. so upgrading to libGD2 or GraphicsMagick are the options here and directly passing things to the gfx-subsystem to avoid the need of having dedicated gfx-commnads for every function). -integration of a small licensing function.... the program is a small cgi program.. so nothing big. -integration of a mysql connector (only if this will not break a given filesize at the end) ... currently already support SQLite.. so commands structure is already there. -Add MD5 hashing capabilities -Add encode/decode functions for AES,3DES,Base64 -Add extra email attachment encoding/decoding function via base64 without overal string size limitation of the rest of the program. -Currently the email handler supports sending mail.. but also needs to allow retreiving mail from pop3 and imap.. with optional leave/delete retreived message. -create a second version of the cgi program as a fast-cgi version/or other standalone server solution (needs discussion and considerations) -expand allowed string length (currently limiteted to about 12000 chars. -add a sendfile command to directly send a file to the client. -little changes in the script handling to allow easier handling on the webserver -some optimisations in regards of speed and size. Project compiles under VC++6 No timewasters (had enough of them in the past!!!)