Question: Please help me creating a Maple 11 Library Archive (.mla file)!!!

Hi everybody,
i'm an italian student, i'd like to create a Maple Library Archive for Maple 11 (a .mla file) with the procedures i want but i don't know how to. Can anyone explain me?

(I want to create a .mla file with some procedures and then recall the library at the initialization of a new worksheet, so that i can use the procedures i defined)

For example, i would like to create a .mla archive with the 2 following procedures:

indet_parameter := proc(expr)
 local Ds, inds,i:
 inds := indets(expr):
 Ds := []:
 for i from 1 to nops(inds) do:
  if StringTools[Search]("D",convert(inds[i],string)) <>0
then
  Ds := [op(Ds),inds[i]]:
  end if
 end do:
Ds:
end proc: 

indet_parameters := proc(expr)
 description "Search for indeterminate parameters 'D' and 'B'",
             "Return two list of parameters 'Ds' and 'Bs'";
 local Ds,Bs, inds,i:
 inds := indets(expr): 
 Ds := []: Bs := []:
 for i from 1 to nops(inds) do:
   if (type(inds[i],symbol) )then
   if StringTools[Search]("D",convert(inds[i],string)) <> 0 then
     Ds := [op(Ds),inds[i]]:
   end if;
   if StringTools[Search]("B",convert(inds[i],string)) <> 0 then
     Bs := [op(Bs),inds[i]]:
   end if;
   end if;
 end do:
(Ds,Bs):
end proc:

and then recall the archive at the beginning of a new worksheet writing:

libname:=libname, "Z:/Documents/NewArchive":  
with(NewArchive):

so that i can now use the commands:

indet_parameter(.....)              and               indet_parameters(.....)  

in a new worksheet to obtain the result i need.
Thanks everybody for help!!!

Have a nice day