Nevermind... I think I understand it now. Sorry for making a pointless thread, if any admins want to delete it then go ahead.
Anyway here's a little script that can help you make soap worms.
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*UPDATED SCRIPT*

function keyclicky(a,b,c,d)
if (a=="p") and (b==112) then
tpt.set_property("life",99999,"soap")
tpt.set_property("tmp2",42,"soap")
tpt.set_property("ctype","stkm","soap")
tpt.log("WORMIFICATION ACTIVATE!")
end
if (toggle~=1) and (toggle~=0) then toggle=0
elseif (toggle==0) and (a=="a") and (b==97) and (d==1) then toggle=1 tpt.log("Autoworm Enabled")
elseif (toggle==1) and (a=="a") and (b==97) and (d==1) then toggle=0 tpt.log("Autoworm Disabled")
end
if (zooming~=1) and (zooming~=0) then zooming=0
elseif (zooming==0) and (a=="z") and (b==122) and (d==1) then zooming=1 tpt.log("zoooooom zooooom zooooom!")
elseif (zooming==1) and (b==122) and (d==2) then zooming=0
end
if (newworm~=1) and (newworm~=0) then newworm=0
elseif (newworm==0) and (a=="o") and (b==111) and (d==1) then newworm=1
elseif (newworm==1) and (b==111) and (d==2) then newworm=0
end
end
function handlethaterror(reason)
if (reason~=nil) then tpt.log("ya dun messed up. Reason: "..reason)
else tpt.log("ya dun messed up and I don't even know how.")
end
end
function autoworm(mousex,mousey,button,state)
if mousex<612 and mousey<384 then mousex,mousey = sim.adjustCoords(mousex,mousey) end
if (button==1) and (toggle==1) and (state==1) and (zooming==0) then partID2 = sim.partID(mousex,mousey)
if (partID2==nil) then tpt.create(mousex,mousey,"soap")
tpt.set_property("life",99999,mousex,mousey)
tpt.set_property("tmp2",42,mousex,mousey)
tpt.set_property("ctype","stkm",mousex,mousey)
if (tmp==nil) then tmp=sim.partID(mousex,mousey) end
if (newworm==1) then tmp=sim.partID(mousex,mousey) end
tpt.set_property("tmp",tmp,mousex,mousey)
tmp = sim.partID(mousex,mousey)
elseif (partID2>=0) then currenttmp = tpt.get_property("tmp",partID2)
if (currenttmp==partID2) then tpt.set_property("tmp",tmp,mousex,mousey)
else tmp = partID2
end
else handlethaterror()
end
return false
end
end
tpt.register_mouseclick(autoworm)
tpt.register_keypress(keyclicky)

Pressing 'a' key will toggle "worm mode".
Once "worm mode" is enabled you can hold the 'o' key and click in the drawing area to make a new worm head, any further clicks will build the worm from there unless you o+leftclick again.
You can also click on an existing particle of soap (or anything else) and that will become the new starting point for the worm.
You can join two worms together by clicking the existing tail of one worm and then clicking the existing head of another worm.
Also, pressing 'p' will turn all soap onscreen into ideal worm conditions. (life 9999, ctype stkm. etc...) this is useful if something went wrong and you need to reset the soap.